#画椭圆
#使用tkinter
from tkinter import *
if __name__ == '__main__':
    x = 360
    y = 160
    top = y - 30
    bottom = y - 30

    canvas = Canvas(width=400, height=600, bg='white')
    for i in range(20):
        canvas.create_oval(250 - top,250 - bottom,250 + top,250 + bottom)
        top -= 5
        bottom += 5

    canvas.pack()
    mainloop()